Internal combustion engine



Nov. 7, 1939. T. E. BROWN 2,1 1

INTERNAL COMBUSTION ENGINE Filed Feb. 9, 1939 lA/VE/VTOR. 76077703 Eaga r Brawn I accomplished by constructing the engine with said mixture, and providing means for. maintaine ,accompanying drawing which shows a vertical Patented Nov. 7,1939

UNITED STATES PATENT OFFICE,

INTERNAL COMBUSTION Enema Thomas Edgar Brown, Hamilton, Ontario, Canada Application February 9, 1939, SerialNo. 255,416

' 6 Claims. '(01. 123 -75) the intake valve l5, and the passage ,22 through the intake valve H. The passage 2| conducts a combustible mixture, for example, gasoline and air, to thecombustion chamber M, the gasoline being drawn into the channel through the nozzle 5 or jet 24. The amount of air allowed to enter the passage 2| is insuflicient for complete combustion. Air is admitted to the chamber l6 through the passage 22 and intake valve II, the amount of air admitted being in excess of the 10 amount required for the complete combustion of the combustible mixture. The flow through the passages 2|, 22 is regulated by the butterfly valve l9. v

The 'intermixing of the combustible mixture i6 admitted toprimary combustion chamber |4 and the air admitted to secondary chamber 16 is substantially prevented during the induction and compression strokes of the'piston by the following means. The intake valve I5 is setin the 20 head so that it is directly over the piston and the cylinder head is turned downwardly as indicated to form a bafile which terminates slightly above the piston at the limit of its upward stroke. The inner wall 26 of the head is extended as from the lower extremityv of the baiile .parallel to the top of the piston towards the combustion chamber l6, overlying approximately one-third of the top of the piston, and then accurately My inventionrelates to a combustion chamber for internal combustion engines and the same has for one of its objects to provide a construction which will ensure the complete combustionv of the combustible mixture admitted to the cylinder, thus assuring a full utilization oi the energy oi the mixture.

A furtherobject of the invention is to provide a structure which will materially reduce the loss of energy by the dissipation of heat through the cooling system of the engine. 7

These principal objects of the invention are primary and secondary combustion chambers, an intake valve for the primary combustion chamber through which is admitted a combustible mixture in which there is present insuflicient oxygen for complete combustion, an intake valve for the secondary chamber through which is admitted a volume of oxygen greater than the amount required for the complete combustion of ing a separation of. the combustible mixture. and the surplus oxygen during the induction and compression strokes of the engine.

Other features of my invention are set forth in the following description having regard to the cross-section of an internal combustion engine constructed in accordance with my invention and showing such parts as are necessary to illustrate the same.

Like characters of reference refer to like parts throughout the specification and drawing.

' The internal combustion engine illustrated in the drawing comprises a cylinder it which is surrounded by the usual water jacket Ill-a, a piston II, a head l2, an exhaust valve l3, a primary combustion chamber l4 which communicates with the cylinder l0 and has an intake valve I5, a secondary combustion chamber l6 which also communicates withthe cylinder and hasan intake valve an intake manifold l8, a butterfly valve |9,. and other members to' be hereinafter described with reference to the above elements. The combustion chamber I4 is substantially larger than the chamber l6 and is provided with a spark-plug Ill. The valves'are: illustrated as being of the type which are mounted in the cylinder head. The exhaust and intake valves are opened and 0 used in the usual manner, the intake valves l5, being opened simultaneously.

The intake manifoldis divided into two passages 2|, 22 by means of a wall 23. The passage l6. By means of this construction a mixing to anygreat extent on the induction stroke is prevented. Owing to the primary combustion cham-' her being made larger than the secondary commixture which has been drawn into the primary chamber and the cylinder with the air awn into the secondary chamber is prevented o the compression stroke iii-tithe manner herein ter more fully explained. r 40 On the induction stroke, the intake valves l5, l1 open, the combustible mixture of gasoline and air being drawn into the primary combustion chamber and the cylinder; and air being drawn into the secondary chamber l6 andthe cylinder. 45 The battle 25 which separates the 'two chambers directs the combustible mixture downwardly'and thus prevents, to any great extent, a mixing of the combustible mixture with the surplus air as already explained.

0n the compression stroke, the primary chamf her being larger than the secondag chamber, it will require a greater volume of 'gas it. This will tend to cause the combustible. mixture, or

2| communicates with the chamber I4 through. substantially all the mixture, to flow into the pricurved into the top of the combustion chamber I bustion chamber,'a mixing of the combustible mary chamber. It is also to be noted that at the end of the induction stroke the combustion chamber will be full of the combustible mixture un-- combustible mixture.

In the event that an insufficient volume of air is admitted into the primary chamber, I have provided an orifice 21 in thewall 23 through which an additional volume of air may .be drawn,

the amount of which is regulated by an adjustable valve 28.

What I claim as my invention is: 1. In an internal combustion engine, a cylinder block having a bore, a piston therein, a cylinder head having a primary combustion chamber on one side of said head and a secondary combustion chamber on the other side thereof, a wall sep-- arating said chambers, an intake valve for-the primary combustion chamber through which is admitted a combustible mixture having insuflicient air for complete combustion, an intake valve for the secondary combustion chamber through which isadmitted a volume of air in excess of the amount required forthe complete combustion of the combustible mixture, andan adjustable valve for increasing the air content of the combustible mixture.-

2. An internal combustion engine having a' cylinder, a piston reciprocable therein, a cylinder head in which is formed a primary combustion chamber and.asecondary combustion chamber, the secondary combustion chamber being of a smaller volume than the primary combustion chamber, a dividing baille separating the chambers and extending across the cylinder head, said baiile being substantially wide and having a flat lower face parallel to the piston top and positioned to just clear the piston top at thelimit of the pistons upward stroke, anintake valvefor the primary combustion chamber through which is admitted a combustible mixture of fuel vapor and air, an exhaust valve in the primary combustion cglamber, a spark plug in the primary combustio chamber, and an intake valve in the secondary combustion chamber through which air only is admitted.

3. An internal combustion engine having a cylinder, a piston reciprocable therein. a cylinder head in which is formed a primary combustion chamber and a secondary combustion chamber, the secondary combustion chamber being. of a smaller volume than the primary combustion chamber, a dividing baflle separating the chambers and extending across the cylinder head, the lower face of said bame being positioned just clear of the piston top at the limit of the pistons. upward stroke, said chambers extending outwardly from the heme wall above the cylinder to points beyond the cylinder wall, an intake valve in the primary combustion chamber and positioned partly over the cylinder top and partly contained in the portion of the chamber extending beyond the cylinder wall and through which is admitted-a combustible mixture of fuel vapour and air, an. exhaust valve wholly coni tained within ,the portion of the primary chamextending beyond the cylinder walks, spark is and air, an exhaust valve in the primary combustion. chamber, a spark plug in the primary plug in the portion of the primary chamber extending beyond the cylinder wall, and an intake valve in the secondary combustion chamber partly positioned over the cylinder top and partly con tained in the portion of the chamber extending beyond the cylinder wall and through which air only is admitted.

4. An internal combustion engine having a.

cylinder, a piston reciprocable therein, a cylinder head in which is formed a primary combustion chamber and a secondary combustion chamber, the secondary combustion chamber being of a smaller volume than the primary combustion chamber, a dividing bafiie separating the chambers and extending across the cylinder head, an

intake valve for the primary combustion chamber through which is admitted a combustible mixture of fuel vapor and air, an exhaust valve in the primary combustion chamber, a spark plug in the primary'combustion chamber, and an intake valve in the secondary combustion chambe through which air only is admitted.

5. An internal combustion engine having a cylinder, a piston reciprocable therein, a cylinder head m which is formed a primary combustion chamben and a secondary combustion chamber, the secondary combustion chamber being of a smaller volume than the primary combustion chamber, a dividing baille' separating the chambers and extending across the cylinder head, an intake valve for the primary combustion chamber through which is admitted a combustible mixture of fuel vapor and air. an exhaust valve in the primary combustion chamber, a spark plug in the primary combustion chamber, an intake valve in the secondary combustion chamber through which air only is admitted, an intake manifold having two separate passages, one of said passages communicating with the intake valve in the primary combustion chamber, the other of said passages communicating with the intake valve in the secondary combustion chamber, and a valve mechanism contained in said passages to synchronously control a flow of air through one passage and a flow of fuel and air through the other P 5 8 6. An internal combustion engine having acylinder, a piston reciprocable therein, a cylinder head in which is formed a primary combustion chamber and a secondary combustion chamber,

bers and extending across he cylinder head, said baille being substantially wide and having a flat lower face parallel .to the piston top and positioned tojust clear the piston top at the limit of he pistons upward stroke, an intake valve for the rimary combustion chamber through which itted a combustible mixture of fuel vapor combustion chamber, an intake valve in the secondary combustion chamber through which air' only is admitted. an intake manifold having two separate passages, one of said'passages communicating with the intake valve in the primary combustion chamber, e other of said passages communicating with t e intake valve in.the-secondary combustion cha her, and a valve mechanism contained in said ass to synchronously control a flow of air through one passage and a flow of fuel and air through the other, passage.

moms moan BROWN. 

